10' CTS V , boost reduction with no error codes.

[undergroundak]

Yo EFI LIve,
I am working on a 2010 V. 2.55 upper pulley, 10% lower,meth,full Kooks system. I'm running into a stumbling block with our tune.Once we roll up to aprox 15 PSI the car will reduce boost to a flat 10psi. No check engine lights. I've raise all boost limiters and torque reduction tables including in the trans controller with no changes. I've byassed all traction control to see if there were any difference too. I must be missing something here so now I post.........I would purchase a base tune to save myself some time since this is a new contoller to me but any tune will need to be adjusted for our conditions and odd combo of mods(15psi,no cats,90 octane and meth). This would not be an option with a locked tune. Anyway fire away with suggestions or questions.

THanks,
Nick

[mbsurfersc]

disconnect the boost control solenoid on the front left side of the blower. its not in the tune.

[undergroundak]

I thought about that but figured I would get some feedback first. I have another week before I can get the tuning worked out(wheels are out being widened). We'll see where we get.

THanks,
Nick

[arubenstein]

I've a CTS-v pushing 16 lbs of boost with no issue, and I didn't disconnect the solenoid. I'd recommend against that, anyway, thats a hacky way of doing it. Send me your tune, I'll have a look.

[Meister]

Ever fix this?

[undergroundak]

Ever fix this?


looks like it ended up being an emissions code for map sensor performance. It take 2 drive cycles (several dyno pulls) for the issue to pop an actual code for map sensor performance. I don't remember the code # off hand.I've deleted this code for n/a to boost and tried it on the V and we have been at 600whp for the summer with no hiccups o far. hope this helps.

Nick